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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations. More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Pisces on June, 25 2017
High Precision Live Sky Chart
00h 43m 55s
+10° 55’ 05”
9.78
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the local timezone Europe/London.

Azimuth: 79.1°
Max altitude: 49.4°
Azimuth: 280.9°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date MagnitudeMag Right AscensionR.A. DeclinationDec. Constellation
2017 Jun 18 9.87 00h 32m 17s +09° 26’ 47” Pisces
2017 Jun 19 9.86 00h 33m 56s +09° 39’ 29” Pisces
2017 Jun 20 9.85 00h 35m 38s +09° 52’ 10” Pisces
2017 Jun 21 9.84 00h 37m 18s +10° 04’ 50” Pisces
2017 Jun 22 9.82 00h 38m 57s +10° 17’ 26” Pisces
2017 Jun 23 9.81 00h 40m 36s +10° 30’ 02” Pisces
2017 Jun 24 9.80 00h 42m 16s +10° 42’ 33” Pisces
2017 Jun 25 9.78 00h 43m 55s +10° 55’ 05” Pisces
2017 Jun 26 9.77 00h 45m 34s +11° 07’ 32” Pisces
2017 Jun 27 9.76 00h 47m 12s +11° 19’ 58” Pisces
2017 Jun 28 9.74 00h 48m 51s +11° 32’ 21” Pisces
2017 Jun 29 9.73 00h 50m 30s +11° 44’ 40” Pisces
2017 Jun 30 9.71 00h 52m 08s +11° 56’ 58” Pisces
2017 Jul 01 9.70 00h 53m 44s +12° 09’ 14” Pisces

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval. The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 03 September 2017 00:00 UTC (JD: 2458000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23144130
Orbit inclination i 5.52316903°
Perihelion distance q 1.83361451 AU
274,304,827 km
Aphelion distance Q 2.93795207 AU
439,511,374 km
Semi-major axis a 2.38578329 AU
356,908,101 km
Orbital period period 3.6900 years
1,345.9996 days
Date of perihelion transit Tp 2017-Nov-18 08:10:28
2,458,075.8406 JD
Argument of perihelion peri 145.31451542935°
Longitude of the ascending node node 259.56450542886°
Mean anomaly M 339.84945924639°
Mean motion n 0.26745923°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.